US stocks sink; S&P 500 index notches another losing week

U.S. stocks are closing broadly lower, giving the market another losing week.

The losses on Friday gave the Standard & Poor's 500 index its fourth losing week out of the last five.

Capital One and Biogen plunged after reporting results that disappointed investors.

Amazon bucked the downward trend. The online retailer soared 10 percent after reporting a surprise profit in its latest quarter.

The Dow Jones industrial average lost 163 points, or 0.9 percent, to finish at 17,568.

The S&P 500 index lost 22 points, or 1.1 percent, to 2,079. The Nasdaq composite declined 57 points, or 1.1 percent, to 5,088.

Bond prices rose slightly. The yield on the 10-year Treasury note fell to 2.27 percent.